yii2 kartik datepicker

Step 1: Install below extension from github

$ php composer.phar require kartik-v/yii2-widget-datepicker "@dev"

Step 2: Use below code in your view file

use kartik\date\DatePicker;

// usage without model
echo 'Birthdate';
echo DatePicker::widget([
 'name' => 'birth_date', 
 'value' => date('d-M-Y'),
 'options' => ['placeholder' => 'Select birth date'],
 'pluginOptions' => [
  'format' => 'dd-M-yyyy',
 ]
]);